Yes, Im aware this is a new account sorry haha. So literally about an hour ago this happened.
My mom asked me if her husband (not my dad) could have some ice cream that I had bought. The way she phrased it "husband wants some of that ice cream you bought before" made it seem to me like she was talking about the ice cream I had bought last week, that I was 1/4 of the way through eating. I told her he could wait till I got home because he has a habit of eating an entire half gallon of ice cream in one sitting and I wanted to make sure he didnt do that. I changed my mind instead and went to the store to buy another (for myself) and give him the rest of the ice cream I had not finished.

Now, I bought BOTH of the ice creams with my own money. In fact I tend to buy all of my own food with my own money. I figured I was just doing him a small favor, he gets the rest of mine and I get a new tub, no biggie.

Well I come home and go to hand it to him and he asks me why I'm angry. I'm seriously confused because I wasn't angry at all, in fact I had literally just opened the door to hand it to him. At first I thought he was joking, he normally jokes around with me. I asked him if he wanted it or not and jokingly went to leave before turning back around and realizing he was serious.
(Now for extra context, I cannot drive yet. I'm 20, I know its stupid, but Im seriously scared of driving but I am working on it. I have my permit and I've driven before)
he had said that I can find another ride (which was when I realized he was actually serious) and I went and asked again if he wanted the rest or not because I bought them both with my own money. I ended up leaving.

I then sent my mom a message saying something like, never ask me for anything ever again if they were gonna be like that. I spent my own money to buy it knowing he would end up wanting some (I had told my mom when I bought the first one to make sure he doesnt eat my ice cream, he's a grown man and knows I have serious boundaries with my own food) I bought another for myself so that he could have the rest of my other one, they can take it or leave it alone.
we then broke into a fight, and I admit I said very hurtful things because I was seriously angry. My mom then claimed she didnt even know I had any, which I know is a lie because I bought it while I was with her AND I explicitly told her to tell him he cant have any of it. She then told me I needed to find somewhere else to go. I made a rude comment after that and there has been no response after.

I showed 2 of my friends and they're both on my side but I just wanted some outside opinion because this feels VERY stupid and overdramatic. A grown 40+ year old man getting prissy over ICE CREAM, I'm trying not to blow up right now.